(n) :
a tailless rodent of the Cavia genus, with short ears and larger than a hamster; the species Cavia porcellus is often kept as a pet; a person who volunteers for an experiment or to try anything new; an experimental subject (from the use of the rodent in laboratory experiments)

(n) :
a tailless rodent of the Cavia genus, with short ears and larger than a hamster; the species Cavia porcellus is often kept as a pet; a person who volunteers for an experiment or to try anything new; an experimental subject (from the use of the rodent in laboratory experiments)